Download Chapter 30 - Worksheet 3

Exam I – Ch. 30 – WS 3
Chapter 30 – The Evolution of Seed Plants
1. Seed plants are divided into what two groups?
 Gymnosperms
 Angiosperms
2. What are some of the advantages to seed plants?
 Pollen grain replaces swimming sperm
- no need for water for fertilization
 Gametophyte is reduce and maintained in the Sporophyte
- microscopic gametophyte
- nourishes sporophyte in early stages of life
- protected from UV rays and dehydration
- no longer free-living, fending for itself
 Heterosporous sporangia
- Megasporangia (female)– produce megaspores that give rise to female
gametophytes; each has a single functioning megaspore
- Microsporangia (male) – produce microspores that give rise to male
gametophytes; each contains vast numbers of microspores
 Seed encloses the embryo
- protects embryo
- contains food
- seed distributes the species, not the spore
3. Describe the heterosporous sporangia found in seed plants and their function.
 Megasporangia (female) – produce megaspores that give rise to female
gametophytes; each has a single functioning megaspore
 Microsporangia (male) – produce microspores that give rise to male
gametophytes; each contains vast numbers of microspores
4. Fill out chart
Gymnosperms
Phylum
Coniferophyta
Cycadophyta
Ginkgophyta
Gnetophyta
Common Name
Conifers
Sago Palm
Gingko Biloba
Ephedra
Exam I – Ch. 30 – WS 3
5. Describe the process from ovule to embryo.
6. Life cycle of a Pine.
Refer to book image!!
Exam I – Ch. 30 – WS 3
7. All Angiosperms are contained in which phylum?
 Anthophyta – accounts for 90% of plant species
8. Label the structures on a flower.
9. What are some unique characteristics of Angiosperms?
 Xylem have two types of tracheid cells
- Fiber Elements
- Vessel Elements (unique)
 Some have distinct male and female flowers on the same plant
 Some plants are distinctly male or female
 Double fertilization
- Egg and Endosperm
10. Life cycle of an Angiosperm
Refer to image in book!!
11. Physical Characteristics of Angiosperms
Characteristic
Cotyledon #
Leaf Venation
Monocots
Eudicots
1
2
Parallel Veins
Netlike Veins
Exam I – Ch. 30 – WS 3
Stem
Arrangement
Scattered Vascular Tissue
Vascular Tissue Arranged in a Ring
Type of Roots
Fibrous Root System
Main root (Taproot) usually present
Pollen Grains
w/ One Opening
w/ Three Openings
Floral Organs in Multiples of 3
Floral Organs in Multiples of
Four/Five
Flowers